3mf reader now uses fast normal calculation
3mf reader now uses fast normal calculation

CURA-3215

Curahelper/Cura,ynotstartups/Wanhao,fieldOfView/Cura,fieldOfView/Cura,hmflash/Cura,hmflash/Cura,ynotstartups/Wanhao,Curahelper/Cura